Description
Moliseal manufactures custom inflatable seal rings and frames in Shanghai, China. Send your equipment drawing, a sample or clear photos so we can review the groove, working gap, inflation direction and material before quoting.
The profile remains retracted while the door, hatch or product moves. Controlled air input then expands the hollow section until it contacts the mating surface.
The groove supports the seal and determines the useful direction of expansion. The profile, corner layout, valve and pressure-control system should therefore be evaluated as one assembly.
Custom inflatable seals can be developed for industrial doors, process hatches, powder-handling equipment, containment closures and other assemblies with a changing or uneven gap.
Suitability depends on the actual contact surface, movement, temperature, medium, cleaning procedure and cycle rate.
Designed around the moving gap
An inflatable seal is useful when a rigid gasket cannot follow a changing or uneven clearance. The seal stays retracted while the door, hatch or product moves, then expands only when a seal is required.
Moliseal develops the cross-section, corner layout and inflation connection from the equipment interface. The design review begins with the groove drawing and the minimum and maximum working gap, not with a generic catalogue size.
Information needed for a quotation
A complete application description reduces sampling cycles and helps identify the correct construction.
- Groove and mating-surface dimensions
- Minimum and maximum sealing gap
- Inflation direction and available air connection
- Temperature, medium and cleaning chemicals
- Required ring or frame dimensions and annual quantity
Prototype before production
Profile pressure, expansion and service life depend on the complete cross-section and its support. Samples should be evaluated in the actual groove with the intended pressure-control system before production approval.
Order from a Shanghai manufacturer
Moliseal makes custom inflatable sealing components in Shanghai, China. We can review a drawing, a representative sample or photos, then discuss the profile, material, joint and air connection for your assembly. A photo helps start the inquiry but does not replace the dimensions needed for final fit.
Send the destination country, quantity and required delivery date with your RFQ. We will confirm a production and shipping schedule for the agreed design rather than applying one lead time to every project.
Frequently asked questions
Can the seal be made as a rectangular frame?
Yes. Joined frames and closed rings can be developed, subject to corner radius and profile review.
Can the air inlet position be customized?
Yes. The valve position and connection style can be reviewed against the available space and installation method.
What information is required for a custom inflatable seal quotation?
Provide the groove drawing, finished ring or frame dimensions, minimum and maximum gap, inflation direction, temperature, contact medium, cleaning chemicals, cycle rate, valve space and expected quantity. Missing interface data normally increases the number of sampling rounds.
How should I choose between silicone, EPDM and NBR?
Choose the compound from the complete operating environment. Silicone is often considered for temperature capability and flexible clean processing, EPDM for water and weathering, and NBR where oil resistance is important. The final grade still needs a compatibility review for the actual medium, cleaning process and cycle conditions.
What inflation pressure should a custom inflatable seal use?
There is no reliable universal pressure for every profile. The required pressure depends on cross-section, wall construction, groove support, gap, contact load, corner geometry and the air-control system. Establish the setting through prototype testing in the actual assembly.
How is the groove size selected for an inflatable seal?
The groove must retain the uninflated profile, allow the intended direction of expansion and avoid sharp edges or local pinch points. Provide the groove and mating-surface drawing so the profile envelope and working gap can be reviewed together.
Can Moliseal make a seal from my sample or photos?
Yes. A sample or clear photos can start the discussion. Please add dimensions or a drawing where possible; the final profile and fit must be checked against the actual equipment interface.
How long does production and international delivery take?
Production and international delivery timing depend on the agreed design, material availability, quantity and destination. Tell us your required date and delivery country; we will confirm a project-specific schedule in the quotation.
